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Lf PAUL JUVT, O F GLENS FLLS, NEW YGRK.

Letters Patent lVo. 4,9189, dat/dimly 2l, 1867.

IMPROVEMENT IN TIME GLOBES.

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To ALL wHoM 1r MAY coNoERN:

Be it known that 1,- LOU1S PAUL JUVET, ot` Glens Falls, in the ,county of Warren, and State ot' New York,

have invented a. new and improved Time Globe; and l do hereby declare that the following is a tull and exact description of the same, reference being had to tlie accompanying drawing, making part of this specification, in which like parts are indicated by like letters in the several figures.

Thc'nature of my invention consists in a revolving terrestrial globe, combined with a chronometer movement within the saine, two stationary dials, and a meridian ring, die.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation. In the drawings- Figure l is a side view of my revolving globe.

Figure 2 is-front view or elevation, the axis being horizontal.

Figure 3 is an axial section of the worksand globe.

A represents a hollow globe made of two hemispherical sections, divided'at the equator, and properly titted,

and secured, aswill hereafter be described. B is an equatorial dial. C is a meridian ring supporting the axis of the globe, as also a dial, D, near one of the poles. The dial B is also secured to it. The meridian ring C slides in a standard, E, by means of a groove a, and corresponding mechanical ittlng. This circle is divided into degrees, so to regulate thc inclination of the axis of the globe at pleasure, at thc same time indicating latitude. b and d arc hands operated by the works insideot` the globe, and indicating the time on dial D the same as on the dial et a clock or'wateh. This dial, however, is marked from one to twelve twice, as the globe revolves once in twenty-four hours. rlhe hands move to the left. Were thc dial at the other pole, they would moveto the right. The aim is to make the globe revolve in the direction our earth does, and I prefer having the dial at the north pole. F F represents the axis ofthe globe on which it revolves. G is a thumb-piece attached to lower cnd of axis Fl, by which to wind the chronometcr inside of globe. The axis F F is secured to circle C by means of two axle boxes c e. f indicates longitudinal lines on the globe, and g those ot' latitude. The works used in the construction of my tiine'globc, as seen in lig. 3, are composed of two plates, 71 JL', united by pillars a. Between the plates and in their centre the barrel-wheel ll, 'containing the main-spring b', which imparts the motion to a train of wheels and pinions, that motion/being regulated by a patent-lever 'or any other escapement able to run in different positions. The barrel-wheel arbor F is made of suitable length to extend through the plate t of the globe A and thc meridian ring O, and receive the thumb-piece G, by means of which the lnain-spring b is wound up from the outside without detaching the sections of the globe and without the use of a special lcy. Thcratchet-wheel n is secured to the arbor below the plate 71.. Uponv the plate z, and coincident with the barrel-wheel arbor, the flanged end c of the arbor F is secured by screws. This arbor is also secured by screws or otherwise to the meridian circle C, thus rendering the works of the chronometer stationary' with the globe. On and around this-arbor F are the two wheels z' and j, receiving their motions from the double-whecl 7c; and these are s ocalculated as to make the wheel j revolve once in two hours, being the one hundred and twenty minutes of the dial D, and the wheel z' one revolution in twenty-four hours; their respective motions being transmitted-by aprolongation of their a-rborsp and o to the globe A, and the two i hands b and d ofthe dial D, these two hands being secured by hard friction to the upper end of theirrespective arbore.v With a slight alteration in thelnumber of teeth of these wheels the dial D could be made with twelve hours only, instead of twenty-four, at the option-of the constructor.v The globe A is made of'two hemispherical sections divided at the equator, and of equal weight, in `order to obtain a regular motion of rotation. They are attached together by means of an inside ring, Z, attached toonc of the sections, over which the other is adjusted and secured by mea-ns of*littlescrewsfour or more. An aperture is made at ene of the poles of proper size to receive and fit the axis F on which it must revolveat the other pole the aperture is made to fit the end of the arbor 0 of daily-wheel t', which imparts the motion to the globe, and the end'of this arbor should be square, scxagon, Octagon, or ot' other angular form by which to carry the globe with it. The globe is prevented from sliding up and down the axis by means of two rings m m', placed one within and one without the globe on F andpse'cured to it by set-screws.

Having thus described the diderent parts of the machine, I will proceed to describe its operation.

Supposing the globe to be stationary, by turning the thumb-piece G attached to arbor F, the main-spring is wound up and motion is imparted to .the works, and through the arbor'o of daily-wheel L' to the globe, this arbor carrying the hour-hand; the latter indicating the-hour` on thedial D, whilst the minute-hand on the arbor p indicates the minutes on the same dial for local time. The globe is thus revolved diurnally. To ascertain the time of day at any part of the globe-say Washington city-look at its meridian vand where it meets the equatorial dial. B, (which is also divided into hours and fractions of thesame.) the time of the day at Washington city and all places on its meridian will at once be ascertained. It, will thus be seen that my time globe illustrates to the pupil the diurnal revolution of the earth on its axis, causing the vicissitudes of day and night, shows the respective time at any meridian, and by means of the additional dial D the instrument ren-ders the services of a common clock, even when not used for educational purposes. If it be desired to attach a regulator, operating from the outside of the globe, it can easily be done, as illustrated by iig. 4. This is effected by Aplacing a sleeve q concentric to the -arbor F', at one end of which is a toothed sector, r, which engages another similar` one, s, adjusted on the balance-wheel bridge and bearing the pins which control the hair-spring. vIt will be readily perceived that by turning the sleeve q the toothed sector 7 will impart the-motion to the regulating sector s, producing-the desired eleet. p

Having thus described my invention, what I claim as new, and desire to' secure by Letters Patent of tho United States, is

1. The axis ofthe globe A, when constructed of the two sections'F and F', the former serving as an axis for the hollow arbors o and p carrying the hour and minute-hands d and (i, and the latter serving as a winding arbor, constructed, arranged, and operating in the manner substantially as shown and described. and for the purpose set forth. l

2. The combination of the dial D, globe A, andthe elironometer movement within the same, arranged, Constructed, and operating in the manner substantially as shown and described and for the purpose set forth.

L. PAUL JUVET.

Witnesses:

THEODORE LANG, S. S. FAHNssrocx. 

